STATION:  KONA INTL AT KEAHOLE ARPT (PHKO), HI

CLIMATOLOGICAL SUMMARY.  Period of Record: Jan 1998 to Dec 2008

Summaries based on unedited daily ASOS data.  Errors may be present.

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TEMPERATURE (F)     |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Avg Max Temp        |  81.5  81.3  82.3  83.2  83.8  85.0  86.2  87.0  86.7  85.9  84.1  82.3 |   84.1
Avg Min Temp        |  68.2  68.0  69.7  70.9  72.1  73.3  74.4  75.2  74.5  73.7  71.7  69.5 |   71.8
Avg Temperature     |  74.8  74.7  76.0  77.0  78.0  79.2  80.3  81.1  80.6  79.8  77.9  75.9 |   77.9
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    87    87    88    89    93    90    93    92    92    97    93    89 |     97
                    |                                                                         |
    Date of Ext-Day |    21    15    19    01    14    10    30    31    02    19    09    06 |
               -Year|  1999  2002  1999  2005  2002  2002  2000  2000  2000  2000  2001  2005 |
                    |                                                                         |
    Extreme Min Temp|    44    60    61    65    48    43    69    70    69    67    53    61 |     43
                    |                                                                         |
    Date of Ext-Day |    07    06    16    05    18    09    08    28    03    27    24    28 |
               -Year|  1998  1998  2005  2008  2004  2000  1998  1999  1999  1999  2007  1999 |
                    |                                                                         |
Heating Degree Days |     0     0     0     0     0     0     0     0     0     0     0     0 |      1
Cooling Degree Days |   305   273   340   361   402   426   475   498   468   458   387   338 |   4731
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.1   0.1   0.3   0.9   0.8   0.7   0.3   0.0 |    3.2
    Max Temp >= 75  |  31.0  28.2  31.0  30.0  31.0  30.0  31.0  31.0  30.0  31.0  30.0  31.0 |  365.2
    Max Temp <= 32  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
    Min Temp <= 32  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
    Min Temp <= 20  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
    Min Temp  <= 0  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
Avg Dew Point Temp  |  63.2  62.7  64.6  64.2  65.6  66.6  68.1  68.7  68.2  67.0  65.8  64.1 |   65.7
Avg Wet Bulb Temp   |  67.5  67.2  68.6  68.8  69.8  70.6  72.1  72.7  72.3  70.9  69.7  68.4 |   69.9
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 29.98 30.01 30.01 30.03 30.01 29.99 29.98 29.97 29.95 29.96 29.97 29.99 |  29.99
(Inches of Mercury) |                                                                         |
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                    |                                                                         |
WEATHER             |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
See disclaimer below|                                                                         |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Thunderstorms   |   0.4   0.2   0.2   0.0   0.1   0.0   0.0   0.0   0.0   0.1   0.1   0.0 |    1.0
    Heavy Fog       |   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.1   0.1   0.0 |    0.4
    Fog             |   2.9   1.3   2.3   1.0   1.5   2.1   1.1   1.1   0.9   1.6   1.7   1.1 |   18.6
    Hail            |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  1.58  1.22  0.80  0.55  0.75  0.98  0.47  0.57  0.68  1.20  1.12  1.00 |  10.92
                    |                                                                         |
Maximum Daily       |  1.83  2.84  2.48  1.14  0.71  1.31  1.42  1.02  1.11  3.17  4.08  3.94 |   4.08
                    |                                                                         |
    Date of Ext-Day |    04    28    16    21    16    27    29    19    08    16    02    05 |
               -Year|  2004  2004  2002  2004  2004  2004  2006  2004  2000  2006  2000  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   4.3   2.6   3.7   3.5   5.8   5.6   3.8   4.3   5.7   3.5   3.5   2.9 |   49.4
    >= 0.10         |   2.3   1.3   1.6   1.1   2.1   2.0   0.8   1.5   1.5   1.5   1.2   1.5 |   18.3
    >= 0.25         |   1.8   0.9   0.5   0.6   1.2   0.9   0.4   0.7   0.6   1.0   0.5   0.9 |   10.2
    >= 0.50         |   1.1   0.7   0.4   0.5   0.5   0.6   0.2   0.4   0.4   0.6   0.5   0.4 |    6.2
    >= 1.00         |   0.6   0.4   0.2   0.1   0.0   0.3   0.2   0.1   0.1   0.3   0.4   0.3 |    2.8
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   8.1   7.8   8.1   8.0   7.8   7.9   7.9   8.0   7.7   7.3   7.3   7.5 |    7.8
Daily Avg Max 2-Min |  16.7  16.8  16.7  16.5  15.8  15.9  16.5  16.6  15.8  16.1  15.9  15.8 |   16.3
Daily Avg Peak Gust |  19.6  19.7  19.4  19.3  18.4  18.5  19.4  19.4  18.5  18.8  18.5  18.4 |   19.0
                    |                                                                         |
Maximum Daily Avg   |  23.0  25.3  24.7  18.4  14.4  11.8  11.8  11.4  11.7  15.3  20.3  25.0 |   25.3
                    |                                                                         |
Maximum 2-Minute Avg|    38    44    39    33    36    29    30    31    25    33    43    41 |     44
                    |                                                                         |
Date of Max 2min-Day|    14    27    27    11    03    17    29    04    12    28    19    10 |
               -Year|  2004  2004  2006  1998  2004  1998  2008  2006  2001  2001  2003  2004 |
                    |                                                                         |
Maximum Peak Gust   |    46    54    44    38    41    37    35    36    31    38    51    49 |     54
                    |                                                                         |
Date of Max Gust-Day|    01    27    27    11    03    17    29    04    12    28    19    07 |
               -Year|  2005  2004  2006  1998  2004  1998  2008  2006  2001  2001  2003  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   3.1   2.7   2.5   1.5   0.9   0.5   1.3   1.0   0.3   1.4   1.7   1.7 |   18.7
   Peak Gust >=40   |   0.5   0.7   0.5   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.2   0.5 |    2.4
   Peak Gust >=50   |   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0 |    0.2
                    |                                                                         |
   Max 2-Minute >=30|   1.6   1.7   0.8   0.4   0.1   0.0   0.1   0.1   0.0   0.3   0.7   0.0 |    5.8
   Max 2-Minute >=40|   0.0   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0 |    0.4
                    |                                                                         |
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies.  Average days
with Thunderstorms may be low due to early mis-detection.

Heavy Fog = Visibility less than or equal to 1/4 mile.
Fog = Visibility greater than 1/4 mile or less than 7 miles.
Peak Gust = Maximum 5-second average.
Snowfall data not observed at ASOS stations.

Copyright ©2009 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.